Display Module

1. A display module, comprising: a display panel, having a display region and a peripheral region disposed next to the display region, the display panel comprising an active device array substrate and an opposite substrate, wherein the opposite substrate covers the active device array substrate in the display region and exposes a portion of the active device array substrate in the peripheral region; and a fingerprint sensor, disposed on the active device array substrate in the peripheral region not covered by the opposite substrate, the fingerprint sensor comprising: a photosensor array, disposed on the active device array substrate; a light guide element, disposed over the photosensor array, wherein the light guide element is a bar-shaped light guide element; and a light source, disposed next to the light guide element, wherein the light source is disposed at an end of the bar-shaped light guide element, and wherein the other end of the bar-shaped light guide element is covered by a reflection layer disposed opposite to the light source to reflect the light from the light source.

2. The display module as claimed in claim 1 , wherein the light source is disposed on a side surface of the light guide element.

3. The display module as claimed in claim 1 , wherein the light source is disposed below the light guide element.

4. The display module as claimed in claim 1 , wherein a bottom of the light guide element is in an arc shape.

5. The display module as claimed in claim 1 , wherein a plurality of microstructures is disposed at a bottom of the light guide element.

6. The display module as claimed in claim 5 , wherein a density of the microstructures is increased from near the light source to far from the light source.

7. The display module as claimed in claim 1 , wherein a gap exists between the light guide element and the photosensor array.

8. The display module as claimed in claim 1 , wherein the light guide element has an upper portion and a lower portion, and a width of the lower portion is greater than a width of the upper portion.

9. The display module as claimed in claim 1 , wherein the light guide element has an upper portion, a lower portion and a middle portion interposed between the upper portion and the lower portion, and a width of the middle portion is greater than a width of the upper portion and a width of the lower portion.

10. The display module as claimed in claim 1 , wherein an end of the bar-shaped light guide element has a chamfered structure, and a reflection layer is disposed on the chamfered structure, and light supplied by the light source is reflected by the reflection layer and is incident to the light guide element.

11. The display module as claimed in claim 1 , wherein the light source comprises a light emitting diode.

12. The display module as claimed in claim 1 , wherein the photosensor array comprises a thin film photosensor array.

13. The display module as claimed in claim 1 , wherein the photosensor array is linearly arranged below the light guide element.

14. The display module as claimed in claim 1 , wherein at least one driving circuit is disposed in the peripheral region of the display panel, and the fingerprint sensor and the at least one driving circuit are disposed at different sides of the peripheral region.

15. The display module as claimed in claim 1 , wherein at least one driving circuit is disposed in the peripheral region of the display panel, and the fingerprint sensor and the at least one driving circuit are disposed at the same side of the peripheral region.

16. The display module as claimed in claim 1 , further comprising a backlight module disposed below the display panel and the fingerprint sensor.

17. The display module as claimed in claim 1 , wherein the opposite substrate is a color array substrate.

18. The display module as claimed in claim 17 , wherein the display panel comprises a liquid crystal layer interposed between the active device array substrate and the color array substrate.

19. A display module, comprising: a display panel, having a display region and a peripheral region disposed next to the display region, the display panel comprising an active device array substrate and an opposite substrate, wherein the active device array substrate comprises an active device array on a substrate in the display region, the opposite substrate covers the active device array and exposes a portion of the substrate in the peripheral region; and a fingerprint sensor, disposed on the substrate in the peripheral region not covered by the opposite substrate, the fingerprint sensor comprising: a photosensor array, disposed on the substrate, wherein the photosensor array and the active device array are in contact with the same surface of the substrate; a light guide element, disposed over the photosensor array, wherein the light guide element is a bar-shaped light guide element; and a light source, disposed next to the light guide element, wherein the light source is disposed at an end of the bar-shaped light guide element, and wherein the other end of the bar-shaped light guide element is covered by a reflection layer disposed opposite to the light source to reflect the light from the light source.

20. A display module, comprising: a display panel, having a display region and a peripheral region disposed next to the display region, the display panel comprising: an active device array substrate; an opposite substrate; and a sealant, connected between and contact with the active device array substrate and the opposite substrate to form an interior area, wherein the sealant surrounds the interior area; and a fingerprint sensor exposed by the opposite substrate, the fingerprint sensor disposed in the peripheral region of the active device array substrate of the display panel and located outside the interior area, the fingerprint sensor comprising: a photosensor array, disposed on the active device array substrate; a light guide element, disposed over the photosensor array; and a light source, disposed next to the light guide element, wherein a plurality of microstructures is disposed at a bottom of the light guide element, and a density of the microstructures is increased from near the light source to far from the light source.

21. The display module as claimed in claim 20 , wherein the light source is disposed on a side surface of the light guide element.

22. The display module as claimed in claim 20 , wherein the light source is disposed below the light guide element.

23. The display module as claimed in claim 20 , wherein a bottom of the light guide element is in an arc shape.

24. The display module as claimed in claim 20 , wherein a gap exists between the light guide element and the photosensor array.

25. The display module as claimed in claim 20 , wherein the light guide element has an upper portion and a lower portion, and a width of the lower portion is greater than a width of the upper portion.

26. The display module as claimed in claim 20 , wherein the light guide element has an upper portion, a lower portion and a middle portion interposed between the upper portion and the lower portion, and a width of the middle portion is greater than a width of the upper portion and a width of the lower portion.

27. The display module as claimed in claim 20 , wherein the light guide element is a bar-shaped light guide element, the light source is disposed at an end of the bar-shaped light guide element, and the other end of the bar-shaped light guide element is covered by a reflection layer.

28. The display module as claimed in claim 20 , wherein the light guide element is a bar-shaped light guide element, an end of the bar- shaped light guide element has a chamfered structure, and a reflection layer is disposed on the chamfered structure, and light supplied by the light source is reflected by the reflection layer and is incident to the light guide element.

29. The display module as claimed in claim 20 , wherein the light source comprises a light emitting diode, and the photosensor array comprises a thin film photosensor array.

30. The display module as claimed in claim 20 , wherein the photosensor array is linearly arranged below the light guide element.

31. The display module as claimed in claim 20 , wherein at least one driving circuit is disposed in the peripheral region of the display panel, and the fingerprint sensor and the at least one driving circuit are disposed at different sides of the peripheral region.

32. The display module as claimed in claim 20 , wherein at least one driving circuit is disposed in the peripheral region of the display panel, and the fingerprint sensor and the at least one driving circuit are disposed at the same side of the peripheral region.

33. The display module as claimed in claim 20 , further comprising a backlight module disposed below the display panel and the fingerprint sensor.

34. The display module as claimed in claim 20 , wherein the opposite substrate is a color array substrate, and the display panel comprises a liquid crystal layer interposed between the active device array substrate and the color array substrate.

35. A display module, comprising: a display panel, having a display region and a peripheral region disposed next to the display region, the display panel comprising an active device array substrate, a sealant and an opposite substrate, wherein the sealant is located between the active array substrate and the opposite substrate to form an interior area; and a fingerprint sensor, disposed in the peripheral region of the active device array substrate of the display panel and located outside the interior area, the fingerprint sensor comprising: a photosensor array, disposed on the active device array substrate; a light guide element, disposed over the photosensor array, wherein the light guide element is a bar-shaped light guide element; and a light source, disposed next to the light guide element, wherein the light source is disposed at an end of the bar-shaped light guide element, and wherein the other end of the bar-shaped light guide element is covered by a reflection layer disposed opposite to the light source to reflect the light from the light source.